Phosphorus Sticks Yellow, Purified. Does anyone know what these are?

Yellow? If you ask me no

Sounds like yellow phosphorus?

Years ago, as a party trick, Swim was shown this,.

If you get the red strips off the side of a match box, with a thin layer of paper on the back.

Then build a small pile on a ashtray, with the red to the inside.

Now light it with a match, it worked best when it smoldered.

When its all burnt, it leaves a yellow oil on the ashtray.

Then the person who told Swim this, smeared this oil onto the finger tips, then rubbed them togeather, after about 15secs smoke began to rise from the finger tips.

Somebody else then said that this glows in the dark!

This was checked, and it did!

Ok, so now Swim guesses that its yellow phos, What potencial damage would this have caused to Swim?